How to Reprogram an Odometer after Swapping Clusters

Here’s how to reprogram the digital odometer on a car when you swap instrument clusters.

Most vehicles store mileage information on the instrument cluster. If the cluster must be replaced, upgraded or swapped from kilometers to miles, the odometer must be reprogrammed to match the correct mileage that the vehicle has traveled.

Disclaimer: Misrepresenting mileage upon the resale of a vehicle without full disclosure is illegal. Reprogramming your own car’s odometer is not illegal.
This video was original posted on my speedkar99 channel.

In this video, a Toyota Corolla’s instrument cluster is upgraded to one with a tachometer and thermometer. The EEPROM chip, which stores the mileage information, is located on the speedometer portion of the circuit, underneath the odometer display.

The EEPROM chip is then desoldered and connected to a serial device programmer – either a stand-alone programmer, or few bucks in resistors and diodes wired directly to the serial port of a computer.

Ponyprog is a free software that can read from a computer’s serial port. Once its setup to read from COM1, the EEPROM chip is selected, in this case, a microwire 93C46 chip. The information is then read from the chip and dumped onto the computer.

The odometer reading is stored in inverted HEX characters, repeated three times. Once decoded, new HEX characters can be written to the chip, and the chip replaced into the speedometer circuit.

This process was demonstrated on a 2001 Toyota Corolla, and is similar for many recent model Japanese cars that store odometer reading in the instrument cluster.

This process is also valid for Toyota Corolla and Matrix vehicles that are stuck at 299K and can be reset to zero.

This video was originally posted on the speedkar99 channel but has been moved to speedkar100 channel.

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قناة Tetra Ninja

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How to Reprogram an Odometer after Swapping Clusters

How to Reprogram an Odometer after Swapping Clusters